Lecidea silacea (Hoffm.) Ach.

Meth. Lich.: 48, 1803. Basionym: Patellaria silacea Hoffm. - Descr. Adumb. Plant. Lich., 1, 4: 89, 1790.
Synonyms: Lecidea subsilacea Nyl.; Lecidella silacea (Hoffm.) Stein; Psora tabacina Ramond ex DC. non auct.
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven, TAA (Hertel & Schuhwerk 2010), Lomb, Piem (Isocrono & al. 2004), VA (HAL-18670), Emil (Fariselli & al. 2020), Lig.
Description: Thallus crustose, episubstratic, rather thick, areolate-verrucose, ochre to rust-red, the areoles convex to bullate, 0.3-1(1.5) mm wide, matt. Medulla white, I+ blue. Apothecia lecideine, black, 0.5-1.5(-2) mm across, arising betweeen the areoles, sessile and constricted at base, with a flat to convex disc and a usually persistent, sometimes finally excluded, raised, often sinuous proper margin. Prope exciple with a thick, brown-black to green-black cortex, more or less colourless within; epithecium bright blue-green or green-black, N+ purple; hymenium colourless of pale green in upper and part, 40-70 µm high; paraphyses sparingly branched and anastomosing, the apical cell to 5 µm wide; subhymentium pale blue-green, well-differentiated from the pale to dark brown, sometimes substipitate hypothecium. Ąsci 8-spored, clavate, Lecidea-type. Ascospores 1-celled, hyaline, ellipsoid to broadly ellipsoid, (7-)8-12(-16) x 4.5-7 µm, 1.6-2 times as long as wide. Pycnidia dark. Conidia bacilliform 8-12 x c. 1 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances, or sometimes with porphyrilic acid, rarely with stictic or norstictic acids.
Note: a probably circumpolar, arctic-alpine to boreal-montane lichen (Hertel 2006) found on iron-containing rocks in humid, sheltered situations, mostly in upland areas. The sample from Valle d’Aosta was collected by B. Feige near Plan Masson near Breuil, at 2500 m.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Species of metal-rich rocks

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: rare
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


Pier Luigi Nimis CC BY-SA 4.0
TSB 41627



Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005



Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005



Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php . Courtesy: Anita Stridvall



Pier Luigi Nimis CC BY-SA 4.0
TSB 41627



Pier Luigi Nimis CC BY-SA 4.0
TSB 41627



Pier Luigi Nimis CC BY-SA 4.0
TSB 41628



Pier Luigi Nimis CC BY-SA 4.0
TSB 41629



P.L. Nimis CC BY-SA 04
TSB 9470


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/